Soft magnetic powder, magnetic core, and magnetic device

Abstract

A soft magnetic powder including a soft magnetic particle containing at least one selected from the group consisting of iron and cobalt: wherein the soft magnetic particle satisfies the relation of σ FeCo (S)−σ FeCo (C)≤0.005, provided that an element distribution obtained by analyzing a surface part of the soft magnetic particle using a 3DAP method is divided into a plurality of grids to calculate a sum of a content ratio of iron and a content ratio of cobalt in each grid.

What is claimed is: 
     
         1 . A soft magnetic powder comprising a soft magnetic particle containing at least one selected from the group consisting of iron and cobalt:
 wherein the soft magnetic particle satisfies the relation of σ FeCo (S)−σ FeCo (C)≤0.005, provided that an element distribution obtained by analyzing a surface part of the soft magnetic particle using a 3D atom probe method is divided into a plurality of grids to calculate a sum of a content ratio of iron and a content ratio of cobalt in each grid, and a standard deviation of the sum of the content ratio of iron and the content ratio of cobalt is represented by σ FeCo (S) where a population is the plurality of grids, and   an element distribution obtained by analyzing a center part of the soft magnetic particle using a 3D atom probe method is divided into a plurality of grids to calculate a sum of a content ratio of iron and a content ratio of cobalt in each grid, and a standard deviation of the sum of the content ratio of iron and the content ratio of cobalt is represented by σ FeCo (C) where a population is the plurality of grids.   
     
     
         2 . A magnetic core comprising the soft magnetic powder according to  claim 1 . 
     
     
         3 . A magnetic device comprising the magnetic core according to  claim 2 .